--- /dev/null
+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
+/* Copyright (c) 2024 NVIDIA Corporation & Affiliates */
+
+#include "mlx5hws_internal.h"
+
+u32 mlx5hws_table_get_id(struct mlx5hws_table *tbl)
+{
+ return tbl->ft_id;
+}
+
+static void hws_table_init_next_ft_attr(struct mlx5hws_table *tbl,
+ struct mlx5hws_cmd_ft_create_attr *ft_attr)
+{
+ ft_attr->type = tbl->fw_ft_type;
+ if (tbl->type == MLX5HWS_TABLE_TYPE_FDB)
+ ft_attr->level = tbl->ctx->caps->fdb_ft.max_level - 1;
+ else
+ ft_attr->level = tbl->ctx->caps->nic_ft.max_level - 1;
+ ft_attr->rtc_valid = true;
+}
+
+static void hws_table_set_cap_attr(struct mlx5hws_table *tbl,
+ struct mlx5hws_cmd_ft_create_attr *ft_attr)
+{
+ /* Enabling reformat_en or decap_en for the first flow table
+ * must be done when all VFs are down.
+ * However, HWS doesn't know when it is required to create the first FT.
+ * On the other hand, HWS doesn't use all these FT capabilities at all
+ * (the API doesn't even provide a way to specify these flags), so we'll
+ * just set these caps on all the flow tables.
+ * If HCA_CAP.fdb_dynamic_tunnel is set, this constraint is N/A.
+ */
+ if (!MLX5_CAP_ESW_FLOWTABLE(tbl->ctx->mdev, fdb_dynamic_tunnel)) {
+ ft_attr->reformat_en = true;
+ ft_attr->decap_en = true;
+ }
+}
+
+static int hws_table_up_default_fdb_miss_tbl(struct mlx5hws_table *tbl)
+{
+ struct mlx5hws_cmd_ft_create_attr ft_attr = {0};
+ struct mlx5hws_cmd_set_fte_attr fte_attr = {0};
+ struct mlx5hws_cmd_forward_tbl *default_miss;
+ struct mlx5hws_cmd_set_fte_dest dest = {0};
+ struct mlx5hws_context *ctx = tbl->ctx;
+ u8 tbl_type = tbl->type;
+
+ if (tbl->type != MLX5HWS_TABLE_TYPE_FDB)
+ return 0;
+
+ if (ctx->common_res[tbl_type].default_miss) {
+ ctx->common_res[tbl_type].default_miss->refcount++;
+ return 0;
+ }
+
+ ft_attr.type = tbl->fw_ft_type;
+ ft_attr.level = tbl->ctx->caps->fdb_ft.max_level; /* The last level */
+ ft_attr.rtc_valid = false;
+
+ dest.destination_type = MLX5_FLOW_DESTINATION_TYPE_VPORT;
+ dest.destination_id = ctx->caps->eswitch_manager_vport_number;
+
+ fte_attr.action_flags = MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
+ fte_attr.dests_num = 1;
+ fte_attr.dests = &dest;
+
+ default_miss = mlx5hws_cmd_forward_tbl_create(ctx->mdev, &ft_attr, &fte_attr);
+ if (!default_miss) {
+ mlx5hws_err(ctx, "Failed to default miss table type: 0x%x\n", tbl_type);
+ return -EINVAL;
+ }
+
+ /* ctx->ctrl_lock must be held here */
+ ctx->common_res[tbl_type].default_miss = default_miss;
+ ctx->common_res[tbl_type].default_miss->refcount++;
+
+ return 0;
+}
+
+/* Called under ctx->ctrl_lock */
+static void hws_table_down_default_fdb_miss_tbl(struct mlx5hws_table *tbl)
+{
+ struct mlx5hws_cmd_forward_tbl *default_miss;
+ struct mlx5hws_context *ctx = tbl->ctx;
+ u8 tbl_type = tbl->type;
+
+ if (tbl->type != MLX5HWS_TABLE_TYPE_FDB)
+ return;
+
+ default_miss = ctx->common_res[tbl_type].default_miss;
+ if (--default_miss->refcount)
+ return;
+
+ mlx5hws_cmd_forward_tbl_destroy(ctx->mdev, default_miss);
+ ctx->common_res[tbl_type].default_miss = NULL;
+}
+
+static int hws_table_connect_to_default_miss_tbl(struct mlx5hws_table *tbl, u32 ft_id)
+{
+ struct mlx5hws_cmd_ft_modify_attr ft_attr = {0};
+ int ret;
+
+ if (unlikely(tbl->type != MLX5HWS_TABLE_TYPE_FDB))
+ pr_warn("HWS: invalid table type %d\n", tbl->type);
+
+ mlx5hws_cmd_set_attr_connect_miss_tbl(tbl->ctx,
+ tbl->fw_ft_type,
+ tbl->type,
+ &ft_attr);
+
+ ret = mlx5hws_cmd_flow_table_modify(tbl->ctx->mdev, &ft_attr, ft_id);
+ if (ret) {
+ mlx5hws_err(tbl->ctx, "Failed to connect FT to default FDB FT\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+int mlx5hws_table_create_default_ft(struct mlx5_core_dev *mdev,
+ struct mlx5hws_table *tbl,
+ u32 *ft_id)
+{
+ struct mlx5hws_cmd_ft_create_attr ft_attr = {0};
+ int ret;
+
+ hws_table_init_next_ft_attr(tbl, &ft_attr);
+ hws_table_set_cap_attr(tbl, &ft_attr);
+
+ ret = mlx5hws_cmd_flow_table_create(mdev, &ft_attr, ft_id);
+ if (ret) {
+ mlx5hws_err(tbl->ctx, "Failed creating default ft\n");
+ return ret;
+ }
+
+ if (tbl->type == MLX5HWS_TABLE_TYPE_FDB) {
+ /* Take/create ref over the default miss */
+ ret = hws_table_up_default_fdb_miss_tbl(tbl);
+ if (ret) {
+ mlx5hws_err(tbl->ctx, "Failed to get default fdb miss\n");
+ goto free_ft_obj;
+ }
+ ret = hws_table_connect_to_default_miss_tbl(tbl, *ft_id);
+ if (ret) {
+ mlx5hws_err(tbl->ctx, "Failed connecting to default miss tbl\n");
+ goto down_miss_tbl;
+ }
+ }
+
+ return 0;
+
+down_miss_tbl:
+ hws_table_down_default_fdb_miss_tbl(tbl);
+free_ft_obj:
+ mlx5hws_cmd_flow_table_destroy(mdev, ft_attr.type, *ft_id);
+ return ret;
+}
+
+void mlx5hws_table_destroy_default_ft(struct mlx5hws_table *tbl,
+ u32 ft_id)
+{
+ mlx5hws_cmd_flow_table_destroy(tbl->ctx->mdev, tbl->fw_ft_type, ft_id);
+ hws_table_down_default_fdb_miss_tbl(tbl);
+}
+
+static int hws_table_init_check_hws_support(struct mlx5hws_context *ctx,
+ struct mlx5hws_table *tbl)
+{
+ if (!(ctx->flags & MLX5HWS_CONTEXT_FLAG_HWS_SUPPORT)) {
+ mlx5hws_err(ctx, "HWS not supported, cannot create mlx5hws_table\n");
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
+static int hws_table_init(struct mlx5hws_table *tbl)
+{
+ struct mlx5hws_context *ctx = tbl->ctx;
+ int ret;
+
+ ret = hws_table_init_check_hws_support(ctx, tbl);
+ if (ret)
+ return ret;
+
+ if (mlx5hws_table_get_fw_ft_type(tbl->type, (u8 *)&tbl->fw_ft_type)) {
+ pr_warn("HWS: invalid table type %d\n", tbl->type);
+ return -EOPNOTSUPP;
+ }
+
+ mutex_lock(&ctx->ctrl_lock);
+ ret = mlx5hws_table_create_default_ft(tbl->ctx->mdev, tbl, &tbl->ft_id);
+ if (ret) {
+ mlx5hws_err(tbl->ctx, "Failed to create flow table object\n");
+ mutex_unlock(&ctx->ctrl_lock);
+ return ret;
+ }
+
+ ret = mlx5hws_action_get_default_stc(ctx, tbl->type);
+ if (ret)
+ goto tbl_destroy;
+
+ INIT_LIST_HEAD(&tbl->matchers_list);
+ INIT_LIST_HEAD(&tbl->default_miss.head);
+
+ mutex_unlock(&ctx->ctrl_lock);
+
+ return 0;
+
+tbl_destroy:
+ mlx5hws_table_destroy_default_ft(tbl, tbl->ft_id);
+ mutex_unlock(&ctx->ctrl_lock);
+ return ret;
+}
+
+static void hws_table_uninit(struct mlx5hws_table *tbl)
+{
+ mutex_lock(&tbl->ctx->ctrl_lock);
+ mlx5hws_action_put_default_stc(tbl->ctx, tbl->type);
+ mlx5hws_table_destroy_default_ft(tbl, tbl->ft_id);
+ mutex_unlock(&tbl->ctx->ctrl_lock);
+}
+
+struct mlx5hws_table *mlx5hws_table_create(struct mlx5hws_context *ctx,
+ struct mlx5hws_table_attr *attr)
+{
+ struct mlx5hws_table *tbl;
+ int ret;
+
+ if (attr->type > MLX5HWS_TABLE_TYPE_FDB) {
+ mlx5hws_err(ctx, "Invalid table type %d\n", attr->type);
+ return NULL;
+ }
+
+ tbl = kzalloc(sizeof(*tbl), GFP_KERNEL);
+ if (!tbl)
+ return NULL;
+
+ tbl->ctx = ctx;
+ tbl->type = attr->type;
+ tbl->level = attr->level;
+
+ ret = hws_table_init(tbl);
+ if (ret) {
+ mlx5hws_err(ctx, "Failed to initialise table\n");
+ goto free_tbl;
+ }
+
+ mutex_lock(&ctx->ctrl_lock);
+ list_add(&tbl->tbl_list_node, &ctx->tbl_list);
+ mutex_unlock(&ctx->ctrl_lock);
+
+ return tbl;
+
+free_tbl:
+ kfree(tbl);
+ return NULL;
+}
+
+int mlx5hws_table_destroy(struct mlx5hws_table *tbl)
+{
+ struct mlx5hws_context *ctx = tbl->ctx;
+ int ret;
+
+ mutex_lock(&ctx->ctrl_lock);
+ if (!list_empty(&tbl->matchers_list)) {
+ mlx5hws_err(tbl->ctx, "Cannot destroy table containing matchers\n");
+ ret = -EBUSY;
+ goto unlock_err;
+ }
+
+ if (!list_empty(&tbl->default_miss.head)) {
+ mlx5hws_err(tbl->ctx, "Cannot destroy table pointed by default miss\n");
+ ret = -EBUSY;
+ goto unlock_err;
+ }
+
+ list_del_init(&tbl->tbl_list_node);
+ mutex_unlock(&ctx->ctrl_lock);
+
+ hws_table_uninit(tbl);
+ kfree(tbl);
+
+ return 0;
+
+unlock_err:
+ mutex_unlock(&ctx->ctrl_lock);
+ return ret;
+}
+
+static u32 hws_table_get_last_ft(struct mlx5hws_table *tbl)
+{
+ struct mlx5hws_matcher *matcher;
+
+ if (list_empty(&tbl->matchers_list))
+ return tbl->ft_id;
+
+ matcher = list_last_entry(&tbl->matchers_list, struct mlx5hws_matcher, list_node);
+ return matcher->end_ft_id;
+}
+
+int mlx5hws_table_ft_set_default_next_ft(struct mlx5hws_table *tbl, u32 ft_id)
+{
+ struct mlx5hws_cmd_ft_modify_attr ft_attr = {0};
+ int ret;
+
+ /* Due to FW limitation, resetting the flow table to default action will
+ * disconnect RTC when ignore_flow_level_rtc_valid is not supported.
+ */
+ if (!tbl->ctx->caps->nic_ft.ignore_flow_level_rtc_valid)
+ return 0;
+
+ if (tbl->type == MLX5HWS_TABLE_TYPE_FDB)
+ return hws_table_connect_to_default_miss_tbl(tbl, ft_id);
+
+ ft_attr.type = tbl->fw_ft_type;
+ ft_attr.modify_fs = MLX5_IFC_MODIFY_FLOW_TABLE_MISS_ACTION;
+ ft_attr.table_miss_action = MLX5_IFC_MODIFY_FLOW_TABLE_MISS_ACTION_DEFAULT;
+
+ ret = mlx5hws_cmd_flow_table_modify(tbl->ctx->mdev, &ft_attr, ft_id);
+ if (ret) {
+ mlx5hws_err(tbl->ctx, "Failed to set FT default miss action\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+int mlx5hws_table_ft_set_next_rtc(struct mlx5hws_context *ctx,
+ u32 ft_id,
+ u32 fw_ft_type,
+ u32 rtc_0_id,
+ u32 rtc_1_id)
+{
+ struct mlx5hws_cmd_ft_modify_attr ft_attr = {0};
+
+ ft_attr.modify_fs = MLX5_IFC_MODIFY_FLOW_TABLE_RTC_ID;
+ ft_attr.type = fw_ft_type;
+ ft_attr.rtc_id_0 = rtc_0_id;
+ ft_attr.rtc_id_1 = rtc_1_id;
+
+ return mlx5hws_cmd_flow_table_modify(ctx->mdev, &ft_attr, ft_id);
+}
+
+static int hws_table_ft_set_next_ft(struct mlx5hws_context *ctx,
+ u32 ft_id,
+ u32 fw_ft_type,
+ u32 next_ft_id)
+{
+ struct mlx5hws_cmd_ft_modify_attr ft_attr = {0};
+
+ ft_attr.modify_fs = MLX5_IFC_MODIFY_FLOW_TABLE_MISS_ACTION;
+ ft_attr.table_miss_action = MLX5_IFC_MODIFY_FLOW_TABLE_MISS_ACTION_GOTO_TBL;
+ ft_attr.type = fw_ft_type;
+ ft_attr.table_miss_id = next_ft_id;
+
+ return mlx5hws_cmd_flow_table_modify(ctx->mdev, &ft_attr, ft_id);
+}
+
+int mlx5hws_table_update_connected_miss_tables(struct mlx5hws_table *dst_tbl)
+{
+ struct mlx5hws_table *src_tbl;
+ int ret;
+
+ if (list_empty(&dst_tbl->default_miss.head))
+ return 0;
+
+ list_for_each_entry(src_tbl, &dst_tbl->default_miss.head, default_miss.next) {
+ ret = mlx5hws_table_connect_to_miss_table(src_tbl, dst_tbl);
+ if (ret) {
+ mlx5hws_err(dst_tbl->ctx,
+ "Failed to update source miss table, unexpected behavior\n");
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+int mlx5hws_table_connect_to_miss_table(struct mlx5hws_table *src_tbl,
+ struct mlx5hws_table *dst_tbl)
+{
+ struct mlx5hws_matcher *matcher;
+ u32 last_ft_id;
+ int ret;
+
+ last_ft_id = hws_table_get_last_ft(src_tbl);
+
+ if (dst_tbl) {
+ if (list_empty(&dst_tbl->matchers_list)) {
+ /* Connect src_tbl last_ft to dst_tbl start anchor */
+ ret = hws_table_ft_set_next_ft(src_tbl->ctx,
+ last_ft_id,
+ src_tbl->fw_ft_type,
+ dst_tbl->ft_id);
+ if (ret)
+ return ret;
+
+ /* Reset last_ft RTC to default RTC */
+ ret = mlx5hws_table_ft_set_next_rtc(src_tbl->ctx,
+ last_ft_id,
+ src_tbl->fw_ft_type,
+ 0, 0);
+ if (ret)
+ return ret;
+ } else {
+ /* Connect src_tbl last_ft to first matcher RTC */
+ matcher = list_first_entry(&dst_tbl->matchers_list,
+ struct mlx5hws_matcher,
+ list_node);
+ ret = mlx5hws_table_ft_set_next_rtc(src_tbl->ctx,
+ last_ft_id,
+ src_tbl->fw_ft_type,
+ matcher->match_ste.rtc_0_id,
+ matcher->match_ste.rtc_1_id);
+ if (ret)
+ return ret;
+
+ /* Reset next miss FT to default */
+ ret = mlx5hws_table_ft_set_default_next_ft(src_tbl, last_ft_id);
+ if (ret)
+ return ret;
+ }
+ } else {
+ /* Reset next miss FT to default */
+ ret = mlx5hws_table_ft_set_default_next_ft(src_tbl, last_ft_id);
+ if (ret)
+ return ret;
+
+ /* Reset last_ft RTC to default RTC */
+ ret = mlx5hws_table_ft_set_next_rtc(src_tbl->ctx,
+ last_ft_id,
+ src_tbl->fw_ft_type,
+ 0, 0);
+ if (ret)
+ return ret;
+ }
+
+ src_tbl->default_miss.miss_tbl = dst_tbl;
+
+ return 0;
+}
+
+static int hws_table_set_default_miss_not_valid(struct mlx5hws_table *tbl,
+ struct mlx5hws_table *miss_tbl)
+{
+ if (!tbl->ctx->caps->nic_ft.ignore_flow_level_rtc_valid) {
+ mlx5hws_err(tbl->ctx, "Default miss table is not supported\n");
+ return -EOPNOTSUPP;
+ }
+
+ if ((miss_tbl && miss_tbl->type != tbl->type)) {
+ mlx5hws_err(tbl->ctx, "Invalid arguments\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+int mlx5hws_table_set_default_miss(struct mlx5hws_table *tbl,
+ struct mlx5hws_table *miss_tbl)
+{
+ struct mlx5hws_context *ctx = tbl->ctx;
+ struct mlx5hws_table *old_miss_tbl;
+ int ret;
+
+ ret = hws_table_set_default_miss_not_valid(tbl, miss_tbl);
+ if (ret)
+ return ret;
+
+ mutex_lock(&ctx->ctrl_lock);
+
+ old_miss_tbl = tbl->default_miss.miss_tbl;
+ ret = mlx5hws_table_connect_to_miss_table(tbl, miss_tbl);
+ if (ret)
+ goto out;
+
+ if (old_miss_tbl)
+ list_del_init(&tbl->default_miss.next);
+
+ old_miss_tbl = tbl->default_miss.miss_tbl;
+ if (old_miss_tbl)
+ list_del_init(&old_miss_tbl->default_miss.head);
+
+ if (miss_tbl)
+ list_add(&tbl->default_miss.next, &miss_tbl->default_miss.head);
+
+ mutex_unlock(&ctx->ctrl_lock);
+ return 0;
+out:
+ mutex_unlock(&ctx->ctrl_lock);
+ return -ret;
+}
projects / linux-block.git / commitdiff